I'm probably going to offend some LEOs, but I have an observation:

These "dynamic entry teams" and "drug task force" squads seem to attract the "cowboys" on the force. My impression from meeting a number of them (my stepkid is LEO) is that a lot of them are pretty cocky, and some are downright overconfident and condescending towards anyone that is not a part of the "team". Seriously, why would they have to make a no-knock entry, dressed like frickin ninjas, on a relatively minor drug warrant? It's not like they were assaulting the main stronghold of the Reynosa cartel. The fact that the officer involved had previously been involved in a (good) shoot also adds fuel to the fire in a civil trial, even if this shoot were entirely justified. Obviously, we don't have all of the facts, just what the news media wants us to have, so this shooting MAY have been justified, but it appears to me that a number of serious errors probably occurred.

Edit: Someone bouncing up the stairs in my house in the middle of the night dressed like a ninja and yelling, will probably go bouncing back down the stairs looking a lot like a ninja full of .45 caliber holes...